Abstract：Using sodium acetate as substrate, the effect of metal ion-chelating agent, nitrilotriacetic acid (NTA), on methane production in the process of anaerobic digestion was investigated. NTA had stimulative effect on anaerobic digestion. At 35℃, addition of 10 μmol/L NTA enhanced methane production by 30%, 45.2%, 64.3% and 95.9% with sodium acetate concentration of 6, 7,10 and 12g/L, respectively. The kinetic constant Vmax and half-saturation constant Ks for anaerobic digestion was improved from 84.8 mL CH4/(gSS×d) to 147.1 mL CH4/(gSS×d) and 2.95 gNaAc/L to 7.57g NaAc/L, respectively. Due to the addition of NTA, the bioavailability of trace metals for methanogens and the acetate utilization rate in anaerobic batch reactors were dramatically increased.
胡庆昊, 李秀芬, 陈坚, 邓宇. 氨三乙酸促进厌氧消化产甲烷的动力学研究[J]. 中国环境科学, 2010, 30(6): 747-751.
HU Qing-Hao, LI Xiu-Fen, CHEN Jian, DENG Yu. Effect of nitrilotriacetic acid on kinetic of methane production during anaerobic digestion. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(6): 747-751.
